Pharmaceutical preparation comprising a compound having an antifungic activity as active principle, an inert core and a coat which includes said active principle, and is characterized in that said inert core has a particle size between 50 and 600 mu m, and is also characterized in that said coat has a unique layer which is produced by nebulization, on said inert core, of a solution which comprises a compound having an antifungic activity, a hydrophilic polymer and a non ionic surfactant. The method is carried out by means of a coating which comprises a unique layer of the inert cores having a size comprised between 50 and 600 mu m by nebulization of a solution comprised of the antifungic agent, the hydrophilic polymer and the non ionic surfactant at constant coating speed throughout the process； a single drying process of the coat is required with the same equipment.
